Captain Underpants – The alter ego of Mr. Krupp, when he is hypnotized to think he is "Captain Underpants," a character created by George and Harold. He always wears underpants and a red cape with black polka-dots. Whenever Mr. Krupp hears the sound of fingers snapping, he turns into Captain Underpants, and turns back into Mr. Krupp when he is soaked with water. Originally, he did not have any real superpowers (even though he believed he did), so George and Harold would have to follow Mr. Krupp every time he transformed into Captain Underpants to make sure he did not get hurt. He gained his superpowers in the third book by drinking some "Extra Strength Super Power Juice" found on an alien spaceship. Captain Underpants is considered to be the 'light side' of Mr. Krupp himself, as he is nice and kind to everyone, especially children. In his Captain Underpants form, Mr. Krupp seems to know everything about Captain Underpants from George and Harold's comic books. This may be due to the fact that he actually read all the comic books made by the two boys, which he confiscated by the hundreds over the years. Yet Captain Underpants' weakness is water

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